I recently explored some free AI trading tools, and there are quite a few good options. First is TradingView, although it's not entirely AI, it has smart indicators and allows you to write Pine Script to automate strategies. The cool thing is you can backtest strategies before running them live, and the free version is quite sufficient.

Another tool is called TrendSpider, which uses AI to automatically recognize price patterns, trendlines, Fibonacci levels without needing to look at charts all day. The signal alert system is also quite fast, but the free version has some limitations.

If you're interested in on-chain analysis, Tuner AI is a decent choice. It analyzes blockchain data and market sentiment, then suggests entry points based on AI. The basic version is completely free.

Another route is using automated trading bots. CryptoHopper is a popular AI trading tool that optimizes your strategies and can connect to major exchanges. The free plan has transaction limits but is still enough for testing.

3Commas is similar; it supports DCA and Grid Trading with AI to manage risk. I find this tool quite useful if you want to automate your trading process without manually closing positions all the time.

Depending on your needs, choose accordingly. Do you want AI to assist with technical analysis, automated trading bots, or on-chain analysis? Each tool has its own strengths.